期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2002
卷号：XXXIV Part 2
页码：95-100
出版社：Copernicus Publications
摘要：Data quality in GIS has been widely recognized as one of the most critical issues in GIS applications in recent years. There are numerous effective error models for managing error propagation in the process of data manipulation and analysis. But there is still a lack of error analysis and its propagation in topological operations. In practical applications, data sources, which have different accuracy of spatial data, will be a necessity of causing inconsistency of topological relations. So this paper analyses topological inconsistency of inaccurate data, and compares their differences of different processing methods. Then, an error propagation model is built, as is easy for users to analyze and understand the effect of error in GIS operations. Finally, a detailed example illustrates its application of the model built in this paper
关键词：Data Cleaning; Topological Construction; Node Snapping; ARC Snapping; General Snapping
